江苏 王一尧

During the social practice,I chose to attend the class named Control of Common Motors for my interest in electrics and motors.I learnt how an alternating-current motor(交流电机)worked and how a frequency converter(变压器)controlled the speed of the motor,which might not be difficulty for me.However,when we were required to connect the wires on our own,I felt nervous.That's really challenging because of the dangerous 380V alternating current we were facing!Fortunately,our teacher guided us with great patience,and I finished the task successfully.Then,we reset the parameters of the frequency converter to get control of the motor by the switches and knobs on the board.By trial and error,I finally managed to adjust the motor to 7 different speeds,and I received an award at the end of the class.

This experience has left a deep impression on me.Not only does it enrich my knowledge of electrics,but it helps me acquire a further understanding of the significance of technology.In addition,it has aroused my admiration for technicians and mechanics,who possess the professional technique that no one else could be their equals.Above all,they are now,and will be making great contributions to our society.